The Kupo Baby Ballhead Adapter With 3/8" Tap features a 1.7" diameter base with a 3/8"-16 screw for compatibility with most tripod heads Compact Aluminum Ball Head Kellermann Atto?é?" Ball Head Adaptor Black 5/8 Spigot To 1 1/8 Receiver Kupo Baby Ball Head Adapter. In stock. SKU KG014212. $31.99. Quantity. Add to Cart. Checkout with Afterpay. Email to a Friend. Description / Kupo Baby Ball Head... Since most grip gear and lighting equipment uses a baby 5/8”(16mm) spigot or a junior mount 28mm (1 1/8”) receiver this accessory adds extra versatility to your gear. KUPO Car Window Mount With Midi Ball Head, KS-CB10 - KUPO Complete with 3 set screws to securely lock the head.