BU-29-0 is a flexible PVC insulator for BU-27 series clips. Model  BU290

Weight: 8.8 g
Dimensions: 3.5" (L), 0.89" (W), 0.89" (H)
• IT is used to electrically insulate bu-27 series clip
• overall length 3.5” (89mm), large id = 0.6” (15mm), wire-end id = 0.22”
(13mm)
• material: insulator flexible pvc
• rating: dielectric strength 5kv at thinnest cross section
temperature -20°f (-30°c) to 160°f (71°c