1/4" Splicing Blocks in stock. These are some of the nicest splicing blocks we've ever seen. All of the blocks are bead finished, industrial hard anodized, tough aluminum alloy for a lifetime of service. A good professional quality splicing block involves a lot of precision machining or the tape will not hold properly and you get a useless, sloppy splice. These blocks are made to exacting tape specifications and are made in Pennsylvania, USA at a precision ISO 9001 machine shop that also makes medical and aerospace parts. Please click on the blue product description below for details.