Our each is a set of (4) removable sink strainers with stainless steel mesh wells and flat rims. The set includes (1) 4-1/2" dia for 2-1/4" drains, (1) 2-3/4" dia for 1-1/8" drains, and (2) 2" dia for 3/4" drains.

This fitted, hinged plastic box from American Tool Group would be worth buying even if it didnt come with hundreds of O-rings. And it does. Black nitrile O-rings sorted by size. O-rings that will stay in their places until you need them. The 407-piece set includes 32 sizes from 1/4" OD x 1/8" ID x 1/16" to 2-1/4" OD x 2" ID x 1/8". It includes the size you're going to need. At your fingertips. Instead of in aisle 12 at the home center.

These are the split rings with the beveled profile, the good ones. The bevel and the largeness of these rings translate to fewer chipped fingernails and blurted-out obscenities. Measure 1-1/2" dia x 1/8" thick, in steel, and hold a bunch of keys.

This float valve assembly has a 2-15/16" x 1-9/16" dia white, barrel-shaped plastic float on a 1" x 1-1/4" stainless steel arm, making it look like a float valve for a Lilliputian toilet tank. Arm is connected to a 1/4" ID check valve with a 1" long flattened shaft and cotter pin connector. Designed for a bottom mount.

The solution to spare keys, and attaching any number of things to any number of other things, is the ubiquitous split ring. These are the even ubiquitouser 15/16" OD x 1/8" steel ones. And at this price you could buy enough to string together to make a steel curtain and add a little snazz to your pad.

O my. It's time to restock the O-ring cabinet. You'll get (36) total, (6) bags of (6) black rubber O-rings, all 1/8" thick. Each bag will have (2) 1-3/4" OD x 1-1/4" ID and (4) 3/4"OD x 1/2" ID. Made in the USA.

Hardware from Monkey Grip, Inc.? Those would be professional–quality tire repair products –– in this case, air–line couplers with a 1/4 NPT thread on one end and a fitting for a T–type connector on the other. The 1–1/2” long interchangeable steel nipples have T–connectors that are threaded. Excellent quality, whatever your application.

What do you give a plumber for his birthday? We recommend some longer T-shirts and maybe some of these 3/8” white PVC 90-degree elbow fittings. Fittings are 3/8” ID and a tad over 1” long on both legs; they come with mating nuts and gaskets.

No, O-rings. Get ’em here, because we got ’em. These black rubber (neoprene, we believe) O-rings are nominally 1-1/2” ID and 1/8” thick, and made in the USA. Use them for crafts, tiny ring toss games, in dioramas or dollhouses, as vibration pads, or in actual O-ring applications. Because, after all, they’re O-rings.

The world of surplus works in mysterious ways. Here we have assorted V-shaped aluminum channels 5-3/4" long x 5/8" wide across the 120° Vs. Picture these nestled behind glass thermometer tubes, imprinted with assorted scales, each with a small mounting hole at the top, maybe tiny crimp-clips to mount the thermometer that isn't there, and a diamond-shaped opening at the bottom for the glass bulb that also isn't there. Then add your own thermometers, use them as teaching aids, string 'em together for tracks or marble runs, or get really creative.