"Duracon" Spacers which measure 6mm OD, and 25mm of length. These utilize a 3mm screw, and can be used for various needs where these measurements fit your need. Available in different lengths ...
Du-Bro's double sided tape assortment comes in 3 ...
different thicknesses: 1/32 (0.7mm), 1/16 (1.5mm), 1/8 (3mm). Each size is diecut with four 1 (25mm) x 3 (76mm) pieces. (12 square inches) Works great for mounting servos, receivers, speed controls, etc. ...
This is a Kyosho Zeal 3mm Vibration Absorption ...
Gyro/Receiver Mounting Gel. Designed to absorb vibrations this mounting gel isolates electronics such as gyros and keeps them from getting false readings when in use. This mounting gel measures 3mm thick and ...