H-870 is a through-hole trimming potentiometer design kit from Bourns' Trimpot product line, offering a general selection of trimming potentiometers for various applications and board designs. The kit includes multiple configurations ranging from single-turn to multiturn potentiometers in sizes from 1/4" to 3/4", including models such as the 3006 (3/4" 15-Turn), 3266 (1/4" 12-Turn), 3296 (3/8" 25-Turn), 3329 (1/4" Single-Turn), 3362 (1/4" Single-Turn), and 3386 (3/8" Single-Turn). All components are RoHS compliant and available in both sealed and open frame configurations. This design kit is suitable for applications including power supplies, control systems, radar systems, analytical equipment, CCTV cameras, and various consumer electronics where precision resistance adjustment is required.