Alvin - Swing-Arm Lamp - 100 Watt - Black - The Alvin Swing-arm lamp with a ventilated 6.5 inch diameter black metal shade with double baffle to reduce glare. Spring-balanced arm locks securely in any position with a 32 inch extension. This Swing Arm Lamp has a two-way mounting clamp for tables up to 1.5 inches thick. Uses a 100w bulb (not included). Alvin is one of the primary sources for drafting supplies and drawing equipment in the country. Creative Coldsnow is a pround retailer of Alvin graphic arts, drafting and fine arts products.