Designed for aligning both inner and outer slidepipes, our #2076 Leveling Block is constructed using heavy plate glass enclosedin a wood case. Two steel riser blocks machined perfectly flat set on either endof the glass. Slide pipes are set on the riser blocks to determine skew ortwist. Works great for soldering and reassemby work. Whensoldering, simply position the area receiving the heat off of either end of theblock. To help hold pipes in place when soldering order our #2078 TROMBONE SLIDE ASSEMBLY MAGNETS. DIMENSIONS overall length: 30" (76cm) overall width: 8.75" (22cm) overall height (with risers): 2" (5.1cm) glass length: 28" (71cm) glass width: 6-3/4" (17.1cm) glass thickness: 0.25" (6.35mm) PLEASE NOTEGranite blocks that are sold for doinghandslide work are designed to check pipes for straightness, alignment, and toaid in reassembly. While granite provides a flat surface, it is quite costly aswell as heavy and cumbersome. To perform these same procedures we offer our #2075Straight Edge and #2076 Leveling Block. Light weight and machined perfectly flat,our Straight Edge is designed to check pipe straightness and is easy to positionat eye level by clamping in a standard bench vise. Our Leveling Block worksgreat for alignment and assembly work and can be easily stored away when not inuse.