Sievert 3506 Pro Neck Tube 750mm – 350601 Roofing & Roadwork Pro 86 & Pro 88 This 750mm long bent neck tube is specifically designed for roofing and road works jobs where a bit of extra reach is needed. If you've found your 3509 (180mm) just isn't getting you there - this is the long neck tube you're going to want. It's 3/8-19 handle thread and M20 × 1 burner thread will connect smoothly to your Sievert Pro 86 and Pro 88 handles. The whole thing is made from high-quality brass - built to last through even the toughest roofing and road surfacing jobs. Key Features & Benefits 750mm Long Neck Tube. We recommend this one for bigger heating jobs, especially roofing and road works - simply because the shorter 3509 just don't have enough reach. Flat, wide angle - better suited